Electric power generation system and control method

Abstract

This electric power generation system comprises: a rotating machine; a storage battery that is discharged when the rotating machine is started; and a discharge control unit controlling the discharge of the storage battery, wherein the discharge control unit controls the discharge from the storage battery when the rotating machine is started, such that the electric power required to start the rotating machine can be provided by electric power from a grid and the discharged electric power from the storage battery.

1 . A power generation system comprising:
 a rotary machine;   a storage battery that is discharged when the rotary machine is activated; and   a discharge control unit that controls discharging of the storage battery,   wherein when the rotary machine is activated, the discharge control unit controls the discharging from the storage battery such that power required to activate the rotary machine is coverable by power from a system and discharge power from the storage battery.   
     
     
         2 . The power generation system according to  claim 1 , further comprising:
 a storage battery remaining power amount calculation unit that calculates a remaining power amount of the storage battery,   wherein the discharge control unit controls the discharging from the storage battery corresponding to the remaining power amount of the storage battery.   
     
     
         3 . The power generation system according to  claim 2 ,
 wherein the discharge control unit discharges the storage battery in any period from a start of activation of the rotary machine to completion of the activation of the rotary machine.   
     
     
         4 . The power generation system according to  claim 3 ,
 wherein the discharge control unit controls the discharging from the storage battery such that the discharge power from the storage battery is maximized in a period from a start of activation of the rotary machine to completion of the activation of the rotary machine.   
     
     
         5 . The power generation system according to  claim 4 ,
 wherein the rotary machine is a gas turbine.   
     
     
         6 . The power generation system according to  claim 2 , further comprising:
 a power difference calculation unit that calculates a power difference between a predicted value of received power from the system when the rotary machine is activated and a total power value that is available from the system,   wherein the discharge control unit controls the discharging from the storage battery corresponding to the power difference and the remaining power amount of the storage battery.   
     
     
         7 . The power generation system according to  claim 6 ,
 wherein the discharge control unit controls the discharging from the storage battery corresponding to a predetermined event when the rotary machine is activated.   
     
     
         8 . The power generation system according to  claim 7 ,
 wherein the event includes at least one of a start of activation of the rotary machine, reaching of a spin rotation speed, ignition, or a self-rotation speed.   
     
     
         9 . The power generation system according to  claim 8 ,
 wherein the discharge control unit receives a signal representing the event from a control unit of the rotary machine.   
     
     
         10 . A control method of a power generation system including a rotary machine, a storage battery that is discharged when the rotary machine is activated, and a discharge control unit that controls discharging of the storage battery, the control method comprising:
 causing, when the rotary machine is activated, the discharge control unit to control the discharging from the storage battery such that power required to activate the rotary machine is coverable by power from a system and discharge power from the storage battery.